I've recently bought a Birdy with a Shimano Alphine 8 IGH.

I've never used an IGH before (at least not a modern one). Is it normal feel a heavy-ish drag from the hub? If I loosen off the brakes and spin the rear wheel by hand, it will not continue spinning feely like a normal feewheel would.

Secondly, it seems like this Afine 8 has a coaster brake. Meaning it's not possible to pedal backwards. Is that original equipment on the Birdy?

Finally, my rear swingarm clamp is broken. Are metal replacements available? The plastic on doesn't seem very robust.